package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.service.SetmealService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {



    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealService setmealService;
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表dish插入1条数据
        dishMapper.insert(dish);

        //获取菜品的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            //向口味表dish_flavor插入n条
            flavors.forEach(dishFlavor -> {
                        dishFlavor.setDishId(dishId);
                    });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
            }

        }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }

 @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        ids.forEach(id -> {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        });


    }

    /***
     * 根据id查询菜品和关联的口味数据
     *  * @param id
     *  * @return
     *  */
    public DishVO getByIdWithFlavor(Long id) {
        //查询菜品表
        Dish dish = dishMapper.getById(id);
        //查询关联的口味
        List<DishFlavor> dishFlavorList = dishFlavorMapper.getByDishId(id);
        //封装成VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavorList);
        return dishVO;
    }

    /** *
     *  根据id修改菜品和关联的口味*
     * @param dishDTO */
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品表dish，执行update操作
        dishMapper.update(dish);
        //删除当前菜品关联的口味数据，操作dish_flavor，执行delete操作
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //插入最新的口味数据，操作dish_flavor，执行insert操作
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);    }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 菜品起售、停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);

try{
    List<Long> dishids=this.SelectSetmealByDishid(id);

    if(dishids.size()>0){
        dishids.forEach(dishid->{
            setmealService.startOrStop(status,dishid);
        });


}
}
catch (NullPointerException e){
    System.out.println("未关联套餐");
}


    }

    /**
     * 根据菜品ID查询包含它的套餐ID
     * @param id
     * @return
     */
    @Override
    public List<Long> SelectSetmealByDishid(Long id) {
       List<Long> Setmealids =dishMapper.SelectSetmealByDishid(id);

        return Setmealids;
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}


